Queen Arachnia Hyde (アラクニア・ハイド Arakunia Haido?) is the queen of the kingdom of Kalise. Arachnia was "created" by Doctor Erich Sigmas as a prototype Reinen Seins, which suceeded greatly. Being a prototype, Sigmas connected a mental link between him and Arachnia before finalizing the preliminary experiment. Sigmas then gave the baby Arachnia to Queen Jaydes, who was the queen of Kalise at the time, to raise Arachnia as her own. Nine years later, after Jaydes' sudden death, Princess Arachnia became the queen and attended King Salvatore's Academy for Future Kings and Queens and met King Anthony. After graduating two years later, Arachnia began to rule Kalise. One day, she went into the Forbidden Room, which she, despite being the queen, was absolutely forbidden to enter. She entered a dark room with a pulsating purple object and touched it. After having touched it, a Dark spiritual wave entered her body, blocked her memories, polluted her heart, and corrupted her brain, transforming her into Queen Chaotica. A long time later, Chaotica becomes Arachnia and helps Commander Donald fight Destros. However, during the battle with Destros, Destros uses Arachnia as a marionette to fight Donald with. After Destros becomes Anthony again, a letter is recieved from Doctor Sigmas demanding that he and Archnia go to Thriller Bark, the kingdom which Sigmas lives in. After arriving, Sigmas discovers that a mental link has been severed and Arachnia must be terminated because her use to Sigmas has ended. However, Anthony saves Arachnia from death, but she becomes Queen Arachnia again. Because a mental link was severed, Chaotica begins to absorb vast amounts of Dark energy which turns into into Final Chaotica, who Anthony soon fights and kills. During the End of the World, Arachnia comes back to life and fights alongside King Anthony to save the world.